I live in AZ and have a salt water, inground 20,000 gallon pebbletec pool with a pop-up in-floor cleaning sytem. Shallow end is 3' and deep end is 6 1/2'. I've NEVER been happy with the in-floor system because it just pushes the dirt and leaves to the shallow end of the pool regardless of how often I brush it to the drains.
I'm going to supplement the in-floor system with an automatic pool cleaner - my thoughts are to run this once a week to get the weekly dirts and leaves (there aren't many leaves) out and the in-floor system can take care of the rest of the week.
My pool guy is pushing the Navigator Pro, but I keep reading it has repair issues after about 2 years. Also, I want something that's going to easily maneuver the steps and possibly get the walls as well.